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 <head>

  <title>CSS Test: table-layout: fixed - cell in the first row with specified width</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />
  <link rel="help" href="http://www.w3.org/TR/CSS21/tables.html#fixed-table-layout" />
  <link rel="bookmark" href="http://lists.w3.org/Archives/Public/www-style/2011Oct/0502.html" title="[css21] Section 17.5.2.1 should be clarified" />
  <link rel="match" href="fixed-table-layout-003e10-ref.xht" />

  <meta name="flags" content="" />
  <meta name="assert" content="A cell in the first row with specified non-auto 'width' sets the width for its column in the absence of a column element with specified non-auto width. This test checks the 'border-collapse: collapse' model with non-zero symetrical horizontal cell padding and with one non-zero horizontal cell border." />

  <style type="text/css"><![CDATA[
  div, table {font: 1.25em/1.2 serif;}

  table
  {
  border-collapse: collapse;
  table-layout: fixed;
  width: 300px;
  }

  td {padding: 0px 24px;}

  td#tested-cell
  {
  background-color: blue;
  border-left: orange solid 0px;
  border-right: orange solid 72px;
  color: blue;
  width: 80px;
  }

  div#reference
  {
  background-color: black;
  color: black;
  margin-left: 68px;

  
  /*
  
  "
  In the fixed table layout algorithm, the width of each column is determined as follows:

  (...) a cell in the first row with a value other than 'auto' for the 'width' property determines the width for that column. (...)
    Any remaining columns equally divide the remaining horizontal table space (minus borders or cell spacing).
  "
  Section 17.5.2.1 Fixed table layout
  http://www.w3.org/TR/CSS21/tables.html#fixed-table-layout


  Middle column width calculations
  --------------------------------
  
   24px : padding-left of the cell in the middle column
 +
   80px : width of the cell in the middle column
 +
   24px : padding-right of the cell in the middle column
 +
   36px : half of border-right since such border must be split with cell in 3rd column 
 
  =======
  164px : width of the middle column

  
  So, 
      300px : table set width 
    - 
      164px : width of the middle column
      ====== 
      136px  
      
      So, each of the 2 remaining columns must be 
      half of such extra horizontal table space, 
      which is 136px divided by 2 == 68px.
  
  1st column width calculations
  -----------------------------
  
    24px    : padding-left of cell in 1st column
  +
    (solve) : width of cell in 1st column
  +
    24px    : padding-right of cell in 1st column

   ======
    68px    : width of 1st column
  
  So, the width of the cell in first column must be exactly 20px.

  
  3rd column width calculations
  -----------------------------
  
    36px    : border-left of cell in 3rd column
  
    24px    : padding-left of cell in 3rd column 
  +
    (solve) : width of cell in 3rd column
  + 
    24px    : padding-right of cell in 3rd column
   =======
    68px    : width of 3rd column
   
   So, the width of the cell in 3rd column must be exactly -16px !
  
  
  Finally, the precise horizontal point where the border-right of cell
  in first column begins to be drawn, painted is:
  
    24px    : padding left of cell in 1st column
  +
    20px    : width of cell in 1st column
  +
    24px    : padding right of cell in 1st column
  ======= 
    68px  
  
  Therefore the margin-left: 68px value of the div#reference.

  */

  width: 200px;
  }
  ]]></style>

 </head>

 <body>

  <p>Test passes if the blue stripe and orange stripe are as a whole <strong>exactly as wide as</strong> the black stripe.</p>

  <table>

   <col />
   <col />
   <col />

   <tr>
    <td></td>
    <td id="tested-cell">E10</td>
    <td></td>
   </tr>

  </table>

  <div id="reference">200px wide</div>

 </body>
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